Roofing Felt Vs Tar Paper

Prospectors during the california gold rush covered the roofs of their temporary shacks with roofing felt also known as felt paper or tar paper.

Roofing felt vs tar paper.

Roofing felt or tar paper is infused with a petroleum based solution to provide an additional layer of roof protection under shingles. The sheathing paper specified by code irc is astm rated type 1 paper astm d226 an asphalt saturated felt tar paper which weighs a minimum of 11 5 pounds per square. Although tar paper has traditionally been the standard undercoating for shingles as of 2010 synthetics are becoming more popular as an underlayment. Sometimes called roofing felt underlayment roofing tar paper or roll roofing this is a layer of protection installed between the roof deck and the roofing shingles.

It also offers fire resistance required for home construction. Of course it is a bit more technical than that but this is the basic idea behind how felt works. Ft or unrated 30 lb. Synthetic underlayment started gaining popularity in the last decade.

Most of the felt paper stocked by lumberyards today is either unrated 15 felt which typically weight around 7 or 8 lbs. Lighter than felt synthetic underlayment is just as easy to work with. Per square 100 sq. Roofing felt offers an additional layer.

Felt is commonly sold in either 15 or 30 rolls measuring 36 inches wide. Roofing felt is comprised of a base made from natural materials such as wood cellulose or synthetic ones such as fiberglass or polyester and then coated or saturated with a. Roofing felt also known as tar paper provides a protective underlayment over the roof deck and beneath the shingles. Synthetic or felt roofing underlayment which is better.

Item 656632 model 0903000. Generally speaking roofing felt is a felt paper that is soaked in asphalt and other water resistant compounds to produce a membrane. It was easy to use durable and even had alignment lines to help with the shingle installation. Fast forward 170 years and roofing felt is still the most popular roofing material now used as an underlayment being installed today.

Long ago a 15 role actually weighed.